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  1. GM Gassers
    I'm swapping my stock 8.1 (260k) for a lower mile 8.1 (80k) ,,, the new one has headers, what plugs and wires should I use, as well as thermostat? I use this for towing. Any other switches or upgrades before installing the motor, Thank you for any advice!
  2. GM Gassers
    I am needing to know if it is possible to swap a 5.3 from a 02 1500 surburban to the 8.1 or at least how difficult it would be if it is able to be done.
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